HMI Device Counters

System Sentry provides performance data totals that indicate device performance since one or all projects in the system started. System Sentry also provides indicators that enable you to monitor current device performance.

Accumulated totals since the project started


For	Counter	Collection	Counts the Number of:
A	Transmissions	Polled	Transmissions to one or all devices, indicates how much activity is going into a communication device. A rapid increase may provide a warning for a communication device overflow.
		Unsolicited	Transmissions will not occur.
A	Responses	Polled	Responses from the device.
		Unsolicited	Responses will increase every time a response for unsolicited communication is received even though ??transmission will not increase.
	Retries	Polled	Times a device has been retried.
A		Unsolicited	Retries will not occur; unsolicited communication requires two transmission failures before a retry can occur.
A	Failures	All	Failures communicating to one or all devices.
E	Skipped Polls	All	Number of polls skipped when communicating to an Async device.

Note: Transmissions, Responses, Retries Failures and Skipped Polls can also be found in diagnostic data for a device.

Indicators of current performance


For	Counter	Collection	Displays the
N	Transmissions/sec	Polled	Transmissions to one or all devices per second.
		Unsolicited	Transmissions will not occur.
	Responses/sec	Polled	Responses from the device per second.
N		Unsolicited	Responses will increase every time a response for unsolicited communication is received even though ??transmission will not increase.
For	Other Counter	Indicates if the Device is Currently:
N	Device Up	1 means the device is up.
N	Device Down	1 means the device is down.

Note: and Device Down can also be found in diagnostic data for a device.

Expertise Code


N	Novice
A	Advanced
E	Expert